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Added LLIMCJITMemoryManager to the lli. This manager will be used for MCJIT instead of DefaultJIMMemoryManager.

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It's more flexible for MCJIT tasks, in addition it's provides a invalidation instruction cache for code sections which will be used before JIT code will be executed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156933 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Danil Malyshev
2012-05-16 18:50:11 +00:00
parent ab53f8ea6a
commit 068c65b22d
3 changed files with 229 additions and 4 deletions
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25
tools/llvm-rtdyld/llvm-rtdyld.cpp
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@ -63,18 +63,37 @@ public:
return 0;
}
// Invalidate instruction cache for sections with execute permissions.
// Some platforms with separate data cache and instruction cache require
// explicit cache flush, otherwise JIT code manipulations (like resolved
// relocations) will get to the data cache but not to the instruction cache.
virtual void invalidateInstructionCache();
};
uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
unsigned Alignment,
unsigned SectionID) {
return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, 0, 0);
FunctionMemory.push_back(MB);
return (uint8_t*)MB.base();
}
uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
unsigned Alignment,
unsigned SectionID) {
return (uint8_t*)sys::Memory::AllocateRWX(Size, 0, 0).base();
sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, 0, 0);
DataMemory.push_back(MB);
return (uint8_t*)MB.base();
}
void TrivialMemoryManager::invalidateInstructionCache() {
for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
FunctionMemory[i].size());
for (int i = 0, e = DataMemory.size(); i != e; ++i)
sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
DataMemory[i].size());
}
static const char *ProgramName;
@ -113,6 +132,8 @@ static int executeInput() {
// Resolve all the relocations we can.
Dyld.resolveRelocations();
// Clear instruction cache before code will be executed.
MemMgr->invalidateInstructionCache();
// FIXME: Error out if there are unresolved relocations.